How do I plot this?
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y=2*sin(x),if x<20
y=cos(3x),if 20≤x<40
y=sin(0.3x),if 40≤x<60
y=8*sin(x),if 60≤x
y=6,if 6<y
Requirements: (1) The plot should have x label, y label, and title. All of these should be Times New Roman, 12 pt. (2) x range from 1 to 100 with 0.1 increment. Plot x-y.
回答（1 个）
Roger Stafford
2018-2-23
I assume you had in mind that x is given in degrees. You will get some discontinuities with these:
x1 = 1:.1:20; y1 = 2*sind(x1);
x2 = 20:.1:40; y2 = cosd(3*x2);
x3 = 40:.1:60; y3 = sind(.3*x3);
x4 = 60:.1:100; y4 = min(8*sind(x4),6);
plot([x1,x2,x3,x4],[y1,y2,y3,y4],'y-')
I will let you work out the label and title details.
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2018-2-21
2018-2-23
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